Block top - The block number and length in the blockchain (in blocks) on development of the present block Nonce - The transaction range for the from address (bear in mind this begins at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://thebookmarklist.com/story20555118/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-fletcher-odonnell-thoughtlanes-net-exploring-further-the-world-of-blockchain